Vernonia School District 47J v. Acton, 515 U.S. 646 (1995), was a U.S. Supreme Court decision which upheld the constitutionality of random drug testing regimen implemented by the local public schools in Vernonia, Oregon. Under that regimen, student-athletes were required to submit to random drug testing before being allowed to participate in sports. During the season, 10% of all athletes were selected at random for testing. The Supreme Court held that although the tests were searches under the Fourth Amendment, they were reasonable in light of the schools' interest in preventing teenage drug use.